226 MEMOIRS NATIONAL ACADEMY OF SCIENCES. vol. xu, 



and largest. The abdominal tubercles are but little smaller than the thoracic and eighth abdomi- 

 nal dorsal tubercle. Along the ventral side of the body is a row of large black linear spots 

 on each side. 



The following stage was described from some larvae hatched from eggs, kindly sent by Mr. 

 Jacob Doll, June 23, 1897. The caterpillars preferred wild cherry leaves to those of the 

 apple. 



Stage III: The larva had molted twice. Length 25 mm. Of the same shape as S. cecro- 

 pia. Head a little over half as wide as the prothoracic segment, apple green, a pair of pear- 

 shaped black spots on each side of the head opposite the apex of the clypeus, a spot at the base 

 of each antemia and one at each side of the labrum. The six prothoracic tubercles turquoise- 

 blue, with black spines; the two median dorsal tubercles of the second and third thoracic seg- 

 ments straw-yellow, while the lateral ones are turquoise-blue, as are the abdominal ones; all 

 the spines black; in Joutel's figure all the dorsal abdominal tubercles are salmon colored or 

 yellow. The simple median tubercle on the eighth abdominal segment yellow, with black 

 spines, while the two dorsal tubercles on the ninth and tenth abdominal segments are turquoise- 

 blue. The body along the back is pale turquoise-blue, green on the sides. Spiracles white, 

 narrowly ringed with black. 



Thoracic legs yellow, tipped with black. 



Abdominal legs green, concolorous with the body, becoming yellow at the end. 



The dorsal tubercles of the second and third thoracic and first abdominal segments are 

 larger than those on abdominal segments 2-9, the latter being all of the same size. The edge 

 of the suranal plate is tinged with straw-yellow. 



The larva of this species is very different from that of S. cecropia of the same stage; the 

 head is green instead of black, and there is no black bridge between the dorsal prothoracic 

 tubercles, and all the tubercles are either blue or yellow, not coral-red, and with no black on 

 them, only the spines being black. The tubercles of the lateral row are all blue, with no black 

 on them. There is neither a median nor two lateral rows of black spots between the tubercles, 

 such as characterize the larva of S. cecropia at this stage. 



In one example the spines are more or less imperfect, tending to become atrophied. One 

 out of six or seven others fed on the wild cherry; on July 12 it was still in stage I, but had grown 

 to the length of 10 mm. 



[SAMIA RUBRA, subspecies.] 



[J. W. Cockle (Entom. News, July, 1908, p. 340) describes a local race occurring in the 

 interior of British Columbia, the general color of which is purple-brown above on all the 

 wings, while the under side is always grayish.] 1 



CALLOSAMIA Packard. 



[Callosamia Packard, Proc. Ent. Soc. Philad., Ill (1864), p. 379.] 



[Dr. Packard has a marginal note in pencil :] 



Compare with Philosamia. Male divergent, female conservative. 2 



CALLOSAMIA PROMETHEA (Drury). 

 Plate XII; XIII, figs. 1-3; XLIX, fig. 3; LXIX, figs. 3, 4; LXX, fig 1; LXXIV, fig. 2. 

 [Attacus promethea Drury, 111. Ex. Ent., II (1773), pi. 11, figs. 1, 2; pi. 12, figs. 1, 2.] 



Moth. — Male (four examples, and others observed). Body and wings dark brown; abdo- 

 men not banded with white. Fore wings uniformly dark vandyke brown from the base to 



'[Two distinct new varieties or races are represented in the National Museum; 



(1.) S. rubra kaslocnsis, collected by Dr. H. G. Dyar at Kaslo. This is the form described by Mr. Cockle, as indicated above. It is a submelanic 

 race, darker above than typical; much blacker and less red below. 



(2.) S. rubra cedroscnsis, marked "Cedars I." (evidently Cedros I.), Mexico. Male. Margins of upper side of wings broadly and suffusedly 

 blackened, the submarginal markings almost entirely lost; ocellus of primaries smallish; discal mark on hind wings longer and more slender 

 than in kaslocnsis; beneath the wings are very black, but the region basad of the bands is suffused with brownish vinaceous.] 



2 [Dr. W. T. M. Forbes notes that Callosamia differs from Samia by the presence of vein Rj in anterior wing, and the alternately longer and 

 shorter pectinations of female antennae.] 



